You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
62 lines
1.6 KiB
Diff
62 lines
1.6 KiB
Diff
There is a variant of MT7621 which contains only one CPU core instead of 2.
|
|
This is not reflected in the config register, so the kernel detects more
|
|
physical cores, which leads to a hang on SMP bringup.
|
|
Add a hack to detect missing cores.
|
|
|
|
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
|
|
|
--- a/arch/mips/kernel/smp-cps.c
|
|
+++ b/arch/mips/kernel/smp-cps.c
|
|
@@ -43,6 +43,11 @@ static unsigned core_vpe_count(unsigned
|
|
return mips_cps_numvps(cluster, core);
|
|
}
|
|
|
|
+bool __weak plat_cpu_core_present(int core)
|
|
+{
|
|
+ return true;
|
|
+}
|
|
+
|
|
static void __init cps_smp_setup(void)
|
|
{
|
|
unsigned int nclusters, ncores, nvpes, core_vpes;
|
|
@@ -60,6 +65,8 @@ static void __init cps_smp_setup(void)
|
|
|
|
ncores = mips_cps_numcores(cl);
|
|
for (c = 0; c < ncores; c++) {
|
|
+ if (!plat_cpu_core_present(c))
|
|
+ continue;
|
|
core_vpes = core_vpe_count(cl, c);
|
|
|
|
if (c > 0)
|
|
--- a/arch/mips/ralink/mt7621.c
|
|
+++ b/arch/mips/ralink/mt7621.c
|
|
@@ -13,6 +13,7 @@
|
|
#include <asm/mips-cps.h>
|
|
#include <asm/mach-ralink/ralink_regs.h>
|
|
#include <asm/mach-ralink/mt7621.h>
|
|
+#include <asm/mips-boards/launch.h>
|
|
|
|
#include <pinmux.h>
|
|
|
|
@@ -160,6 +161,20 @@ void __init ralink_of_remap(void)
|
|
panic("Failed to remap core resources");
|
|
}
|
|
|
|
+bool plat_cpu_core_present(int core)
|
|
+{
|
|
+ struct cpulaunch *launch = (struct cpulaunch *)CKSEG0ADDR(CPULAUNCH);
|
|
+
|
|
+ if (!core)
|
|
+ return true;
|
|
+ launch += core * 2; /* 2 VPEs per core */
|
|
+ if (!(launch->flags & LAUNCH_FREADY))
|
|
+ return false;
|
|
+ if (launch->flags & (LAUNCH_FGO | LAUNCH_FGONE))
|
|
+ return false;
|
|
+ return true;
|
|
+}
|
|
+
|
|
void prom_soc_init(struct ralink_soc_info *soc_info)
|
|
{
|
|
void __iomem *sysc = (void __iomem *) KSEG1ADDR(MT7621_SYSC_BASE);
|